In the following the new insert-codes of Gothic 3: Forsaken Gods. The old items and npcs have still the same codes (Insert-Codes Gothic 3 classic). The marvin-mode works like in Gothic 3 classic.Note: It's a translation from the German list so it's possible that some names of items or npcs differ in your games.

Armor Chests
Chest at the stone circle near Ardea/Vengard: Hero_Special_Chest_01
Chests at the Goblins near Ardea/Vengard: Hero_Special_Chest_02
Chest in Gotha near Gorn: Hero_Special_Chest_04
Chest in the tower of Vengard: King_Armor_Chest
Chest next to Robart's throne: Hero_Special_Chest_03

1 Bookstand in a house in the inner castle: +5 Ancient Knowledge
1 Bookstand in the library inside the tower in the inner castle: +5 Ancient Knowledge
2 Bookstands inside the Alchemy laboratory in the inner castle: 2x +5 Alchemy
1 Bookstand in the library inside the tower in the inner castle: +5 Alchemy